I see...
The rocks must go!!! And I might just make this a novelty piece and leave out the gameplay. It's REALLY unfortunate that none of my maps will compile in the OB engine and run in ep2 without crashing, I can't figure out why, but it's probably because of some weird bug that I never found out how to fix.
I might just do a sloped wall that the water runs down, kind of like that one part in Mirrors Edge where you slide down that really long water slope. I want to try and create a really nice-looking waterfall texture that has refracting properties. I can code it but the problem lies with getting it to render right on a brush.
I also might get rid of the volumetric lighting and make the light coming in a lot paler. Either that or just block it off.